Da vs Old Man

Da

name
  • A great serpent in the mythology of Dahomey. 

Old Man

name
  • A creator god in some Native American mythologies. 

  • A title given to the personification of a force of nature or abstract concept, such as Old Man Winter or Old Man River. 

How often have the words Da and Old Man occurred in a corpus of books? (source: Google Ngram Viewer )